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COUPLING OF ASSUMED STRESS FINITE ELEMENT AND BOUNDARY ELEMENT METHODS WITH STRESS-TRACTION EQUILIBRIUM

Acta Mechanica Sinica 2004年第1期20卷 76-81页

作者： guzelbey ibrahimh. KANBER Bahattin AKPOLAT Abdullah University of Gaziantep Mechanical Engineering DepartmentGaziantep 27310Turkey

In this study, the stress based finite element method is coupled with the boundary element method in two different ways. In the first one, the ordinary distribution matrix is used for coupling. In the second one, the stress traction equilibrium is used at the interface line of both regions as a new coupling process. This new coupling procedure is presented without a distribution matrix. Several case studies are solved for the validation of the developed coupling procedure. The results of case studies are compared with the distribution matrix coupling, displacement based finite element method, assumed stress finite element method, boundary element method, ANSYS and analytical results whenever possible. It is shown that the coupling of the stress traction equilibrium with assumed stress finite elements gives as accurate results as those by the distribution matrix coupling.

关键词： coupling assumed stress FEM BEM stress-traction equilibrium

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BOUNDARY ELEMENT ANALYSIS OF CONTACT PROBLEMS USING ARTIFICIAL BOUNDARY NODE APPROACH

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Acta Mechanica Sinica 2003年第4期19卷 347-354页

作者： BahattinKANBER ibrahimh.guzelbey AhmetERKLIG UniversityofGaziantep MechanicalEngineerin9DepartmentGaziantepTurkey

An improved version of the regular boundary element method, the artificial boundary node approach, is derived. A simple contact algorithm is designed and implemented into the direct boundary element, regular boundary element and artificial boundary node approaches. The exisiting and derived approaches are tested using some case studies. The results of the artificial boundary node approach are compared with those of the existing boundary element program, the regular element approach, ANSYS and analytical solution whenever possible. The results show the effectiveness of the artificial boundary node approach for a wider range of boundary offsets.

关键词： boundary element method contact problems regular boundary element artificial boundary node

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The efficiency of direct integration methods in elastic contact-impact problems

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Acta Mechanica Sinica 2005年第4期21卷 395-401页

作者： Ibrahim H.guzelbey Ahmet Erklig Bahattin Kanber University of Gaziantep Mechanical Engineering DepartmentGaziantep-Turkey

A comparison of direct integration methods is madeand their efficiency is investigated for impact ***-mark,Wilson-θ,Central Difference and Houbolt Methodsare used as direct integration *** analysisincludes that of elastic and large deformation based uponupdated Lagrangian including buckling *** resultsshow that the direct integration methods give differentresults in different contact-impact cases.

关键词： Elastic impact,Direct integration methods,Finite strain Contact

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